switch (tag) {

case Value::TAG_NULL: return SqlType::NULL_TYPE;

case Value::TAG_BOOL: return SqlType::BOOLEAN;

case Value::TAG_INT64: return SqlType::BIGINT;

case Value::TAG_UINT64: return SqlType::BIGINT;

case Value::TAG_DOUBLE: return SqlType::DOUBLE;

case Value::TAG_DECIMAL: return SqlType::DECIMAL;

case Value::TAG_STRING: return SqlType::VARCHAR;

case Value::TAG_BYTES: return SqlType::VARBINARY;

case Value::TAG_DATE: return SqlType::DATE;

case Value::TAG_TIME: return SqlType::TIME;

case Value::TAG_DATETIME: return SqlType::DATETIME;

case Value::TAG_TIMESTAMP: return SqlType::TIMESTAMP;

case Value::TAG_JSON: return SqlType::JSON;

default: return SqlType::UNKNOWN;

}

switch (kind) {

case SqlType::BOOLEAN: return Value::TAG_BOOL;

case SqlType::TINYINT:

case SqlType::SMALLINT:

case SqlType::MEDIUMINT:

case SqlType::INT:

case SqlType::BIGINT: return Value::TAG_INT64;

case SqlType::FLOAT:

case SqlType::DOUBLE: return Value::TAG_DOUBLE;

case SqlType::DECIMAL: return Value::TAG_DECIMAL;

case SqlType::CHAR:

case SqlType::VARCHAR:

case SqlType::TEXT:

case SqlType::MEDIUMTEXT:

case SqlType::LONGTEXT: return Value::TAG_STRING;

case SqlType::BINARY:

case SqlType::VARBINARY:

case SqlType::BLOB: return Value::TAG_BYTES;

case SqlType::DATE: return Value::TAG_DATE;

case SqlType::TIME: return Value::TAG_TIME;

case SqlType::DATETIME: return Value::TAG_DATETIME;

case SqlType::TIMESTAMP: return Value::TAG_TIMESTAMP;

case SqlType::JSON:

case SqlType::JSONB: return Value::TAG_JSON;

default: return Value::TAG_NULL;

}